[ntp:questions] Re: Which public servers for adjustment?
brad at stop.mail-abuse.org
Fri Dec 24 04:35:34 UTC 2004
At 10:38 PM +0000 2004-12-23, Barry Bouwsma wrote:
> Don't forget to poke at all the routers along the way. Sometimes, though
> not as often as in the past, you'll find accurate servers that way.
Note that this information has been confirmed by people working at
> I need a NTP time server. Where can I find one?
> Install a NTP server on your local network or look at www.ntp.org for
> a public NTP time server in the geographical proximity.
We prefer that people use <http://ntp.isc.org/>.
> If you are interested in installing a NTP server, then it might be of
> interest knowing that the Test Traffic Measurements service's probes,
> the "Test-Boxes", have a GPS clock and can therefore be used as
> stratum-0 NTP servers. For more information, go to
> www.ripe.net/test-traffic .
Please see the RulesOfEngagement at
<https://ntp.isc.org/bin/view/Servers/RulesOfEngagement>, and the
rest of the discussion at
> Interesting. I didn't find a list of all the geographical locations
> of the machines out there, but a few random traceroutes confirmed
> their scatteredness. I don't know how open these machines are for
> outsiders to use, which is why I don't want to publicize them too
> much, but...
Right. Please see above.
> And as noted, unless I hear from RIPE or someone that these servers
> can be used for more than private use, you should not use them for
> more than a one-off `ntpdate' test. Some of them are already hidden
> from public prying, so the fact that others are reachable should not
> be taken to mean they are open for the public to abuse.
Very good advice. Please do not abuse time servers which belong
to someone else.
Brad Knowles, <brad at stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
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